<script setup>
    import son  from './01_son.vue'
    import {ref} from 'vue'

    let msg = ref("初始化值!!");
</script>

<template>
  <div>
    <son :message="msg"></son>
    <hr>
    <button @click="msg='新的值'">修改msg</button>
  </div>
</template>

<style scoped>

</style>